Volume (filling prism with cubes, amount of space)
Finding Volume of a Rectangular Prism By Counting Cubes video
Measuring Volume of Rectangular Prism with Cubic Units video
Finding Volume (Math Antics) video
Surface Area of 3D Shapes video
Khan Academy video: Rewriting mixed numbers as improper (and vice verse, and practice!)
LOOK at the place value chart. Notice that one decimal place is tenths and two decimal places is hundredths. SO, a fraction /10 is one decimal place and a fraction /100 is two decimal places.
Khan Academy video: Relationship between fractions, decimals and percentages